
let list=[];
let tmp1 = ""
let tmp2 = ""
let tmp3 = ""
let tmp4 = "";
for (let i = 0; i <= 23; i++) {
    if (i < 9) {
        if (i == 0) {
            tmp1 = "0" + i + ":15";
            tmp2 = "0" + i + ":30";
            tmp3 = "0" + i + ":45";
        } else {
            tmp1 = "0" + i + ":00";
            tmp2 = "0" + i + ":15";
            tmp3 = "0" + i + ":30";
            tmp4 = "0" + i + ":45";
        }
    } else {
        tmp1 = i + ":00";
        tmp2 = i + ":15";
        tmp3 = i + ":30";
        tmp4 = i + ":45";
    }
    if (i == 0) {
        list.push(tmp1);
        list.push(tmp2);
        list.push(tmp3);
    } else {
        list.push(tmp1);
        list.push(tmp2);
        list.push(tmp3);
        list.push(tmp4);
    }
}
list.push("24:00");
console.log(list)

